Could not get the solution right

#1

Can you explain how the variable number is working?

#2

hello @udatta

which variable ? i didnt get ur doubt.

pls share ur code that u are submiting

#3

I am facing problem in editorial only.

#4 
int strToInt(string str, int number)
{
    if (str.length() == 0)
    {
        return number;
    }
    char ch = str[0];
    number = number + (ch - 48) * (int)pow(10, str.length() - 1);
    string ros = str.substr(1);
    return strToInt(ros, number);
}

here number is 123

then first we are adding value 1 * (10^2) to number and then calling the same function of remaining string i,e 23
and then adding adding 2 * (10^1) to the number and calling it to remining string i,e 3
again adding 3 ^ (10^0) to number and call ing remaining stirng which is ‘’ string
since this is our base case we return number which is 1*10^2 + 2 * 10^1 + 3 *10^0

#5

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